Heel-plate.



No. 887,791. PATENTED MAY 19, 1908.

II. J. GRISWOLD.

HEEL PLATE.

APPLICATION FILED JUNI'. 29,1907.

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A TTO/e/VE V5 UNTTED STATES PATENT OFFICE.

HARRY J. GRISWOLD, OF EUREKA, CALIFORNIA.

HEEL-PLATE.

Application filed June 29, 1907.

To cllwhom it may concern:

Beit known that I, HARRY J. GRIsWoLD, a citizen of the United States, residing at Eureka, in the county of Humboldt and State of California, have invented a new and useful Heel-Plate, of which the following is a specification.

My present invention relates to improve ments in calks and especially to that class adapted for use on the heels or soles of the shoes or boots worn by loggers, miners, ice

harvesters, and the like, for preventing accidental slipping, and it has for its object to provide an improved device of this character that is capable of being readily applied to very light soled boots and shoes in such a way'that the calks are arranged in close proximity to the edges of the heel or sole, and the calks are so looked in position that they cannot possibly upset and are not liable to bend or otherwise become displaced and injure the sole of the boot or shoe, and they are capable of being easily interchanged or replaced whenever desirable or necessary.

Another object of the invention is to provide a device of this character that is relatively light in weight in order that it may not hinder the movements of the wearer.

To these and other ends, the invention comprises the various novel features of construction and combination and arrangement of parts, which will be hereinafter more fully described, and pointed out particularly in the appended claims.

In the accompanying drawing Figure l is a side elevation of a portion of a boot or shoe equipped with a heel plate constructed in accordance with the present invention, portions being shown in section. Fig. 2 is a detail sectional view showing a mode of attaching the plates to rubber boots and to boots and shoes having relatively light soles. Fig. 3 is a view showing the parts disconnected and in perspective.

Corresponding parts in the several figures are indicated throughout by similar characters of reference.

It will be understood, of course, that the present invention is capable of being applied to calk supporting plates which are adapted to be applied either to the heel or the sole portion of a boot or shoe, the plates being shown adapted for attachment to the heel in the present instance, although a mode of attaching the plates to the sole is shown.

In the present embodiment of my inven- Specfcaton of Letters Patent.

Patented May 19, 1908.

Serial No. 381,450.

tion, a relatively fiat bearing plate 1 is employed which may be of any desired shap'e to fit'that portion of the boot or shoe to which it is applied, it being in the shape of a yoke or horseshoe, in the present instance, so as to conform substantially to the outline of the usual heel, the plate being of a size somewhat less than that of the heel, and it is provided with apertures 2 through which the attaching screws or other fastening devices employed may pass.

Cooperating with the bearing plate is a securing or locking plate 3 which conforms generally to the outline of the bearing plate, it

having an outer peripheral flange 4 which is turned toward the sole or heel and is preferably of sucha size that it will closely fit around the periphery of the bearing plate, an inner iiange 5 being formed on the locking plate and extending parallel with the outer flange to closely engage the inner edge of the bearing plate. The locking plate is provided with countersunk apertures 6 arranged to register with the apertures 2 of the bearing plate, screws 7 passing through the apertures in the locking and bearing plates and entering the material of the heel to secure the plates firmly in position thereon. The calks 8 may be of any shape to suit the conditions under which they are to be used, and they are provided with relatively fiat laterally expanded heads 9 adapted to be clamped between the coperating locking and bearing plates, the screws or equivalent devices 7 serving not only to fasten the device to the heel or other portion of theboot, but they also serve to produce the requisite clamping action upon the heads of the calk. The shanks of the latter extend downwardly through the aperture l() in the locking plate, and, if so desired, they may be tapered somewhat in order that a tightening effect may be produced between them and the walls of the corresponding apertures in the locking plate when the latter is drawn to position, and the tightening effect on the calks, taken in connection with the clamping action upon the flat heads of the calks, will serve to effectually prevent upsetting or displacement thereof. The flanges 4 and 5 on the locking plate preferably project from the upper surface thereof a distance equal to the combined thickness of the bearing plate and the heads of the calks, in order that the upper edges of the flanges may engage adjacent portions of the sole or heel when the locking plate is in position, the flanges coperating with the bearing plate to retain the latter and the locking plate in proper relation, and also may be adapted for attachment to the sole portions of boots and shoes and in those cases where the sole is relatively thin, or is composed of soft material, such as rubber, the securing means shown in Fig. 2 may be employed in place of the screws shown in Fig. 1, the securing means comprising, in the present instance, a bolt 11 having a relatively large flat head 12 adapted to engage the inner side of the sole, the shank of the bolt extending through the sole and through the apertures 13 and 14 formed in the bearing and locking plates, respectively, the lower end of the bolt being threaded to receive a nut' 15 which serves the dual function of se curing the bearing and locking plates in cooperative relation and of fastening them both to the sole. In both forms of attaching devices, it is preferable to locate the heads of the screws, or the nuts, as the case may be, between two adjacent calks, as this will protect them from wear.

A device of the character described constructed in accordance with the present invention is capable of being manufactured cheaplyfas the bearing'and locking plates may be readily punched and formed from sheet metal by the use of dies, and it is only necessary to insert the calks and apply the fastening devices, which serve not only to secure the device to the boot or shoe but they also serve to lock the plates in coperative relation to secure the calks, and, whenever necessary or desirable, the calls may be interchanged or replaced by unfastening the securing devices, the flanges on the locking plate overlapping the edges of the bearing plate and preventing the entrance of snow or water that would be liable to rust the calks in place, and as the heads of the latter engage the metallic bearing plate, the weight imposed upon them cannot drive them upwardly and cause their loosening.

Vhat is claimed is 1. A device of the character described embodying a bearing plate adapted to engagethe bottom of. a shoe sole or heel, a coperating locking plate having calli receiving apertures and provided with a peripheral flange arranged to surround and cooperate with the periphery ofthe bearing plate, a set of calks carried by the locking plate, and means for securing the latter and the bearing plate in coperative relation,

. 2. A device of the character described embodying a bearing plate adapted to engage .with the heel portion of the boot to secure the plates in coperative relation and to fasten them to the boot.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

HARRY J. GRISWOLD.

l/Vitnesses:

W. S. COOPER, G. W. RAGER. 

